<li><a href="<?php echo $this->Html->url(array('controller' => 'Principal', 'action' => 'index')); ?>" title="" class="active"><?php echo $this->Html->image('epcm/dashboard.png') ?><span>INICIO</span></a></li>

<li><a href="<?php echo $this->Html->url(array('controller' => 'Trabajos', 'action' => 'index')); ?>" title="" class="active"><?php echo $this->Html->image('epcm/forms.png') ?><span>TRABAJOS</span></a></li>
